World Karting Association Confirms 2021 Speedway Dirt Schedule World Karting Association Confirms 2021 Speedway Dirt Schedule Mitchell Koolen / Wednesday, October 7, 2020 0 2910 Article rating: 4.5 the World Karting Association is excited to confirm the WKA Maxxis Tire Speedway Dirt Series Presented by Summit Racing. With five events across the eastern half of the country and an additional non points paying event at the famed Dirt Track at Charlotte Read more